Arctic marine mammals on thin ice
The loss of sea ice due to climate change could spell disaster for polar bears and other Arctic marine mammals. The April Special Issue of Ecological Applications examines such potential effects, puts them in historical context, and describes possible conservation measures to mitigate them. The ...
Muscle atrophy through thick but not thin
During desperate times, such as fasting, or muscle wasting that afflicts cancer or AIDS patients, the body cannibalizes itself, atrophying and breaking down skeletal muscle proteins to liberate amino acids. In a new study published online June 8 and in the June 15, 2009 print issue of the Journal...
Eliminating bacterial infections out of thin air
When microorganisms invade the body, immune mechanisms kick in to fight them off. The infected tissues typically show depleted oxygen levels, and a protein called HIF-1 alpha regulates this. Interestingly, the cells responsible for destroying the foreign pathogens are effective in this low-oxygen e...
Extraterrestrial platinum was 'stirred' into the Earth
... with it, leaving the mantle and crust with none," Dr Barnes said.
"Following that, a steady rain of meteorites created the so-called Late Veneer a thin
surface layer of meteorite debris rich in platinum."
With time through large-scale convection processes, which now cause plate tectonics, this mater...
Jet-propelled imaging for an ultrafast light source
...the opening in the outer tube, so the gas surrounds it, then increases speed and pressure as it approaches the opening, squeezing and accelerating the thin
stream of liquid until it is so small that the proteins or viruses dissolved in the liquid can only fit into the droplets one at a time.
And the n...
All-in-1 nanoparticle: A Swiss Army knife for nanomedicine
...ses proteins to surround a quantum dot core with a thin
gold shell held at 3 nanometers distance, so the t..."
Gao and Jin avoided this problem by building a thin
gold sphere that surrounds but never touches the q...ers to build a 2- to 3-nanometer gold shell that's thin
enough to allow about half of the quantum dot's fl...
DOE-funded research projects win 46 R&D 100 Awards for 2009
NEXUS DLC-X Coating System with Pulsed Filtered Cathodic Arc Technology a system that promises more computer memory at less cost by depositing thin
films of diamond-like carbon required by next-generation computer hard-disk heads. (Jointly with Veeco Instruments, Inc.)
TEAM Electron Microscop...
New windows opened on cell-to-cell interactions
...ssue of Soft Matter , a journal of the Royal Society of Chemistry, UO doctoral student Yupeng Kong and Parthasarathy applied biological material -- a thin
layer of membrane lipids -- onto to tiny glass spheres about one-millionth of a meter in diameter to closely study colloidal interaction.
Toxin detection as close as an inkjet printer
...d of biocompatible silica nanoparticles is first deposited on paper, followed by a second ink containing the enzyme, and the resulting bio-ink forms a thin
film of enzyme that is entrapped in the silica on paper. When the enzyme is exposed to a toxin, reporter molecules in the ink change colour in a mann...
Arctic climate under greenhouse conditions in the Late Cretaceous
...tive sediment core samples display a regular alternation of microscopically thin
layers composed of two distinctly different diatom assemblages, reflecting ...ne biological) production may become of increasing importance."
accumulations of earthborn sediment within the diatom ooze are consistent w...
New way to make sensors that detect toxic chemicals
... Beach, is more interested in how nickel oxide's electrical conductance changes when toxic chemicals in the air settle on its surface. Beach applies a thin
coating of the material onto microelectro-mechanical systems (made in a similar fashion to computer chips), with a goal of identifying known toxic sub...
Dietary supplements manufacturers gain new tool to help ensure quality products
...ngredients. In addition to these standards, the DSC includes general and regulatory information, guidance documents, appendices, and macro/microscopy, thin
layer chromatography (TLC) and high performance liquid chromatography (HPLC) full-color images that greatly simplify the analysis of ingredients of bo...
Dogs, humans, put heads together to find cure for brain cancer
...ers at North Carolina State University have discovered that a gene commonly believed to be involved in meningiomas-tumors that affect the meninges, or thin
covering, of the human brain and account for one out of four adult brain tumors -may not be as key for tumor formation as previously thought, and they...
The sound of light: Innovative technology shatters the barriers of modern light microscopy
...acilitate the examination of tumors or coronary vessels in humans.
Since the dawn of the microscope scientists have been using light to scrutinize thin
sections of tissue to ascertain whether they are healthy or diseased or to investigate cell function. However, the penetration limits for this kind of...
Ovarian transplantation: New technique gives greatly improved results in this delicate operation
...zen grafts. The scientists used the cortical grafting technique, where very thin
slices of tissue are transplanted. This technique is much easier to perform...ng factor, not to mention the deleterious effect of freezing. However, very thin
cortical slices not only allow the tissue to be frozen by vitrification, bu...
The battle for CRTC2: How obesity increases the risk for diabetes
...findings, to be published in the June 21, 2009 advance online edition of the journal Nature , explain how obesity sets the stage for diabetes and why thin
people can become insulin-resistant.
The Salk team, led by Marc Montminy, Ph.D., a professor in the Clayton Foundation Laboratories for Peptide Bio...
Potential for non-invasive brain tumor treatment
...he neural tissue.
In a series of experiments in animal models and simulated tissues, the researchers demonstrated that they could build a catheter thin
enough to be placed in one of the brain's main blood vessels that was capable of serving the dual purpose of visualization and heating.
"Taken as a...
UCLA cancer researchers develop model that may help identify cancer stem cells
...and his team collected specimens from patients with malignant pleural effusions, a condition in which an abnormal amount of fluid collects between the thin
layers of tissue lining the outside of the lung and the wall of the chest cavity.
They had found in previous attempts that culturing lung cancer ce...
New method separates cancer cells from normal cells
...lls' different shapes and mobility characteristics. Migrating cancer cells tend to be more round and broad while normal, epithelial cells are long and thin
with long protrusions on the ends. The researchers designed a channel with "spikes" coming out at 45-degree angles from the walls, alternating on oppo...
Major breakthrough in early detection and prevention of AMD
Neovascular (or "wet-type") macular degeneration is caused by choroidal neovascularization (CNV) the invasive growth of new blood vessels in the thin
vascular layer that provides nourishment and oxygen to the eye. Central vision loss occurs when these abnormal blood vessels invade the retina, the li...
A tiny frozen microbe may hold clues to extraterrestrial life
...al standards it is 10 to 50 times smaller than E. coli . Its small size probably helped it to survive in the liquid veins among ice crystals and the thin
liquid film on their surfaces. Small cell size is considered to be advantageous for more efficient nutrient uptake, protection against predators and o...
Researchers create freestanding nanoparticle films without fillers
...th a number of different methods to mold them into thin
films which have a variety of interesting potentia...pically consist of an inorganic core coated with a thin
layer of organic molecules. These particles are not very sticky so they don't form coherent thin
films unless they are encapsulated in a polymer co...
Aluminum-oxide nanopore beats other materials for DNA analysis
...ore sensor, made by drilling a tiny hole through a thin
film of aluminum oxide, could ultimately prove cap...e called atomic layer deposition to produce a very thin
film of aluminum oxide on a silicon substrate.
Ne...y. "Ultimately, we'd like to make our membranes as thin
as biological membranes, which are about 5 nanomet...
Slicing chromosomes leads to new insights into cell division
...hought to arise out of the interaction between protein motors on the arms of chromosomes that push against cells' microtubules. Microtubules are long, thin
tubes that form a central component of the cytoskeleton and the mitotic spindle. They serve as intracellular structural supports and as railways along...
Validus and HierStar Form Strategic Alliance to Offer the First Complete Range of Authentication Products
...ilities, it owns significant intellectual property in the areas of low-cost thin
flexible LCD displays, manufacturing processes and powered card molding.
...technologies are based on HierStar's engineering, experience and patents in thin
and flexible circuit boards, components and displays, as well as molding te...
Jeepers creepers: Climate change threatens endangered honeycreepers
...disease would be able to be transmitted throughout most of the year," said Atkinson.
In addition, the tropical inversion layer often visible as a thin
cloud layer around high peaks -- may play a more significant role than temperature in determining tree line and the upper extent of forest bird habita...
New tool for next-generation cancer treatments using nanodiamonds
...nts, including DNA, viruses and other therapeutically relevant materials."
Nanodiamonds have also proven effective in seeding the growth of diamond thin
films. These diamond films have exciting applications in next-generation nanoelectronics. Here again, the ability to pattern nanodiamonds with sub-10...
Non-wovens as scaffolds for artificial tissue
...ient's knee the supporting scaffold is gradually resorbed and only the cartilage tissue remains.
While it is quite easy to produce npn-wovens from thin
polymer fibers, it is difficult to describe these materials experimentally and theoretically. What forces do the cells experience when the non-woven i...
Princeton geoscientist offers new evidence that meteorite did not wipe out dinosaurs
...sult, scientists refer to this time as the K-T boundary.
At many locations, the K-T boundary is clearly visible in rock formations, which contain a thin
layer of clay rich in the element iridium. Because iridium is more common in asteroids and comets than on Earth, scientists proposed in 1980 that an a...
Nanoneedle is small in size, but huge in applications
...in with a rigid but resilient boron-nitride nanotube. The nanotube is then attached to one end of a glass pipette for easy handling, and coated with a thin
layer of gold. Molecular cargo is then attached to the gold surface via "linker" molecules. When placed in a cell's cytoplasm or nucleus, the bonds wi...
Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes
...ted into the body to improve the quality of ultrasound images. In UMGD, the tiny particles are microbubbles composed of pockets of gas encapsulated by thin
membranes that are coated with DNA before injection. A targeted pulse of ultrasound energy "rings" the bubbles like a bell, popping them in a specific...
Cold and brown fat raise the prospect of a new method of treating obesity
...dults, in the lower part of the neck just above the collarbone.
The region of brown fat cells in the neck was tested by placing five volunteers, in thin
clothing, in a chilly room for a couple of hours. The researchers then investigated this region by PET scanning and discovered that metabolism there w...
Signals from stroking have direct route to brain
...fic journal, Nature Neuroscience. The research group examined a group of healthy subjects using a technique called microneurography.
"By inserting a thin
electrode into a nerve in the forearm we can listen in on the nerve and pick up signals from one of the thousands of nerve fibres that make up a nerve...
Ancient diatoms lead to new technology for solar energy
... to form a template.
A biological agent is then used to precipitate soluble titanium into very tiny "nanoparticles" of titanium dioxide, creating a thin
film that acts as the semiconductor for the dye-sensitized solar cell device. Steps that had been difficult to accomplish with conventional methods ha...
Cheap and efficient white light LEDs new design described in AIP's Journal of Applied Physics
...lbs produce light by sending electricity through a thin
metal filament that glows red hot. Only about five...al toxin.
LEDs on the other hand, are made from thin
wafers of material flanked by electrodes. When an ... or by sending colored light through a filter or a thin
layer of phosphors -- chemicals that glow with sev...
Two-day symposium in Baltimore to tackle the promises and perils of proton radiotherapy
...uis will begin the symposium with a session that presents the state-of-the-art in understanding and creating therapeutic beam of protons. In theory, a thin
beam of protons can destroy a tumor with less damage to surrounding tissues than the broader cone of X-ray photons. This is because the protons penetr...
UniPixel Announces Availability of Opcuity(TM) Finger Print Resistant Film Test Samples
...lletin Board: UNXL), the developer of a unique new thin
film called Opcuity(TM) FPR (Finger Print Resistan...TMOS development, UniPixel has created a family of thin
film products it calls Opcuity(TM) that have broad...ing partners and intends to supply its Opcuity(TM) thin
films to those manufacturers. UniPixel produces O...
A paradigm shift in immune response regulation
...", Ivan Dikic points out. Ectodermal dysplasia is a hereditary disease, which affects 1 to 5 children in 10,000 newborn. It causes the skin to be very thin
and the perspiratory glands to malfunction. In some cases it is combined with immune deficiency. The molecular defect is a mutation in the NEMO gene, ...
Metastatic bone disease patients can walk in Lazarus' footsteps
...hout the skeletal system. Some bone metastases become painful because the tumor eats away at the bone (ostelolysis), creating holes that make the bone thin
and weak. As the bones are replaced with tumor, nerve endings in and around the bone send pain signals to the brain and the bone loses its functional ...
Geologists map rocks to soak CO2 from air
...lite and others-- may be squeezed to the surface when continental plates collide with oceanic plates, or, less often, when the interiors of continents thin
and develop rifts. Because of their chemical makeup, when the rocks are exposed to carbon dioxide, they react to form common limestone and chalk. A ma...